Shade holder for threaded electric-lamp sockets



- G. A. BOOMER.

SHADE HOLDER FOR THREADED ELECTRIC LAMP SOCKETS.

APPLICATION HLED FEB.16. 1920.

1,426,951. Patented Aug. 2 2, 1922.

'and avoiding the necessity earner ole-race.

enonen A. nooiunn, or

WATERBURY, CONNECTICUT, ASSIGNOR TO THE PLUME &

ATWOOD MFG. CO., 0F WATER/BURY, CONNECTICUT, A CORPORATION.

SHADE HOLDER FOR THREADED ELECTRIC-LAMP SOCKETS.

T 0 all whom it may concern:

Be it known that I, GEORGE A. BOQMER, a citizen of the United States, residing at lVaterbury, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Shade Holders for ThreadedElectric-Lamp Sockets; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description-of the same, and which saiddrawings constitute part of this application, and represent, in-

Fig. l. A view inside elevation showing one embodiment of my invention.

Fig. 2. A broken view on the full scale, partly in elevation and partly in vertical central section.

Fig. 3. An enlarged broken detail sectional view showing the application of a finishing-cap to the exterior threads of the shade-support proper.

Fig. 4.. A similar view, showing the application of the shade-support and its cap to a standard lamp-socket, with the positioning-member of the support brought into conjunction with the lower turn of the threads upon the socket for positioning the shade-support and its cap upon the socket.

Heretofore, the shade-holders employed for supporting the glass shades of incandescent electric lamps have generally consisted of an exterior shade-supporting member receiving a lip formed at the upper edge of the shade and provided with a plurality of independently operated, radially arranged screws for engagement with the outer periphery of 'the lip. Shade-holders of the type described are inconvenient, insecure, and unsightly, and frequently result in the breakage of shades on account of the uneven tension placed upon the lips thereof by the several screws. The object of my present invention is 'to avoid these objections by producing a shade-holder centering and supporting the shade from within the same, thus eliminating the use of screws of providing the shade with a special lip for its support and thus very materially cheapening the cost of producing such shades.

With these ends in view, my invention consists in a shade-supporter for threaded electric-lamp sockets. the said shade-holder being adapted in shape and size to be 10- Specification of Letters Patent.

Patented Aug. 22, 11922.

Application filed February 16, 1920. Serial No. 359,149.

cated within'the contracted upper portion of the shade and comprising a depending, flaring, annular, shade-supporting flange, an upstanding threaded collar adapted to be screwed u on the threaded lower end of a standard amp-socket, and astop or abutment for positioning the holder upon the lamp-socket.

My invention further consists in certain details of construction as will be hereinafter described and pointed out in-the claims.

' In carrying out my invention as herein shown, my improved interior shade-holder consists of a depending, outwardly flaring, annular, shade-supportingflange 2 having an integral, concentric, upstanding, threaded collar 3 separated from the flange 2 by an inwardly extending shoulder or knurl a forming an abutment with which the lower turn of the thread 5 6 engages to position the shade-support thereupon.

The said shade-holder is adapted in shape and'size to be located within the contracted upper end or neck of a standard shade 7 which may be of any approved .form and construction and which I speak of as a standard shade. because whatever their form'in' other respects, such shades, as supplied by the glass-makers to the trade, have contracted upperends or necks standardized to adapt them for use with shade-holders of standard sizes: such as 2% inch, 3% inch,

4 inch, and so on.

As shown, the flange 2 has its lower edge "notched and turned radially inward to form into al fingerlugs 8 by means of which the ii older is screwed upon the. thread of the socket 6'and unscrewed therefrom.

For the concealment of the edge or lip of a standard socket.

9 of the shade 7, I preferably employ a 4 finishing-member shown in Figs. 1, 2, and 3 as consisting of an annular cap 10 having a concentric depending threaded collar 11 adapted to be screwed upon the outside of the upstanding collar 3 of the shadeholder. The said cap is also formed with an overhanging flange or skirt 12 designed to enclose and conceal the, lip 9 of the shade, as shown in Fig. 2, and turned inwardly to make contact therewith, as at 13. This is not essential thou h it tends to prevent the shadefrorn rocking upon the flange 2 of the shade-holder.

As shown, the shade 7 is furnished with a lip.) primarily designed for use with an externally applied shade-holder provided with screws. It is not essential that the shade shall be provided with such a lip, for

use in conjunction with my improved shadeholder, but such provision does not disqualify it for use therewith.

Under my invention, the shade is centered by gravity and internally supported entirely at .a. point within its contracted upper end or neck upon the depending flaring flange of the shade-holder without recourse to screws which,-as already stated, are not only inconvenient and insecure, but very liable to exert such pressure'on the shade as to crack it. Furthermore, such screws are unsightly in appearance and can not be enclosed and concealed to render the fixture sightly, because in that case they would be inaccessible for use. Under my invention, the lip or upper ed e of the shade may be entirely concealed]. y a finishing-member which has no supporting function thou h it may be utilized to prevent any roc ing movement of the shade upon the shadeholder. 0n the other hand, in case the shade is inverted, the finishing-member would then become a supporting-member and the shade fit on the inside of a lamp-shade, and comprising an outwardly flaring shade-supportin flange, an upstanding threaded collar a apted to be screwed upon the threaded end of a lamp-socket, and an inwardly projecting positioning-member interposed between the said flange and collar for direct engagement with the lower turn of the ,threads upon the lamp-socket, of a shade-binding member comprising a threaded collar adapted to be screwed upon the outside of the upstanding threaded collar of the said shadesupporting member and provided with means for engaging the outer surface of the shade.

2. In a shade-holder for use with threaded electric lamp-sockets, the combination with an inside shade-supporting member adapted to fit on the inside of a lamp-shade, and comprising an outwardly flaring, shade-supporting flange, an upstanding, threaded'collar adapted to be screwed over the threaded end ofa lamp-socket, and an inwardly projecting annular positionin -bead. interposed between the inner edge of the said flange and the lower end of the said collar for direct engagement with the lower turn of the threads upon the lamp-socket; of a shadebinding member having a depending threaded collar adapted to be screwed upon the outside of the upstanding threaded collar of the shade-supporting member and also having an overhanging binding-flange originating at the upper end of the said depending threaded collar and shaped to engage the outer surface of the shade.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

GEORGE A. BOOMER.

Witnesses:

D. A. WILLIAMS,

G. H. SCI-ILOUGH. 

